番ばん号ごう継けい続ぞく制せい

noun

mobile number portability

Technical term for the system allowing users to keep their phone number when switching carriers. Introduced in Japan in October 2005. Often referred to by the English-derived term ナンバーポータビリティー.

See also: ナンバーポータビリティー

• 番ばん号ごう継けい続ぞく制せいのおかげで、携けい帯たい会社がいしゃを変かえても同おなじ番ばん号ごうが使つかえる。

  Thanks to number portability, you can keep the same number even if you change mobile carriers.